JPS6142401A - Apparatus for producing endless metallic belt - Google Patents

Abstract

PURPOSE:To provide a device which improves the fatigue life of an endless metallic belt to be run by being put on tension rollers by providing large- and small-diameter rolling rollers which face each other and press respectively said belt from the inside and outside circumferential sides thereof. CONSTITUTION:At least one of the tension rollers 10 and 11 is rotationally driven by a driving mechanism and runs endlessly the endless metallic belt 2 put thereon. The rollers 10, 11 are variable in the distance between the same and can apply tension to the belt 2. The 1st rolling roller 12 is provided between the rollers 10 and 11. This roller contacts with the inside circumferential surface of the belt 2 and presses the belt outward from the inside circumferential side thereof. The 2nd rolling roller 13 is disposed on the outside circumferential side of the belt 2 so as to face the roller 12. This roller has the outside diameter smaller than the outside diameter of the roller 12 and rolls the belt 2 between said roller and the roller 12. The belt 2 is then spread larger on the outside circumferential side than on the inside circumferential side so that the residual compressive and tensile stresses are generated respectively on the inside and outside circumferential sides. The durability of the belt 2 is thus improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for manufacturing an endless metal belt used for power transmission.

[Technical background of the invention and its problems]

For example, endless metal belts used in continuously variable transmissions for automobiles or for general power transmission generally transmit power through pulleys 1.1, as schematically shown in FIG. For this reason, the endless metal belt 2 has pulleys 1.
It is used under severe stress conditions in which tensile stress is applied to the outside at position 1, compressive stress is applied to the inside, and repeated bending stress is applied.

For this reason, for example, as seen in Japanese Patent Application Laid-Open No. 53-42172, tensile stress is applied to the inner circumferential side of the metal belt in advance.
Alternatively, attempts have been made to apply compressive stress to the outer circumferential side, but these have not been sufficient to improve the fatigue life.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and its object is to provide an apparatus for manufacturing endless metal belts that is highly effective in improving the fatigue life of metal belts such as.

[Summary of the invention]

The gist of the present invention is to provide a tension roller that wraps around an endless metal belt and applies tension while running the metal belt; a first rolling roller that presses outward from the metal belt; and a second rolling roller that rolls the metal bell between the rolling roller and the second rolling roller.

According to the above configuration, it is possible to roll the metal belt under stress, but in this case, a part of the metal belt is wound around the rolling roller of the cylinder 1, and this first roller Since the diameter is larger than that of the 20th roller, deformation of the inner peripheral side of the metal belt in contact with the first roller is restrained during rolling. On the other hand, since the second rolling roller has a small diameter, the outer peripheral side of the metal belt is constrained relatively little by the second rolling roller. Therefore, when rolling a metal belt, the outer circumferential side is expanded more than the inner circumferential side. As a result, compressive residual stress can be generated on the outer circumference of the belt, and residual tension stress can be generated on the inner circumference of the belt.
The durability of this type of endless metal belt, which is subjected to repeated bending stress, can be greatly improved.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. In the figure, reference numeral 10.11 indicates a tension roller. At least one of these tension rows 210, 11 is rotatably driven by a drive mechanism (not shown), and an endless metal belt 2 is wound around it to cause the belt 2 to run endlessly. Furthermore, the above-mentioned tension roller 10°11
are configured so that the distance between them can be changed and a tensile force can be applied to the metal belt 2. The metal belt 2 is formed in advance into an endless band shape, for example, from stainless steel or the like with a thickness of about 0.1 mm to 0.3 mm.

However, the material and thickness do not matter.

A first rolling roller 12 is provided between the tension rollers 10 and 11. The first rolling row 212 is in contact with the inner peripheral surface of the metal belt 2 and presses the belt 2 from the inner peripheral side toward the outside. Further, a second rolling roller 13 is arranged on the outer peripheral side of the metal belt 2, facing the first rolling row 212. This second rolling row 213 has a smaller outer diameter than the first rolling row 212, and is adapted to roll the metal belt 2 between it and the first rolling roller 12. Further, in order to support the second rolling roller 13, a backup roller 14 is provided as necessary.

The apparatus of the embodiment having the above configuration performs rolling using the rolling rows 212 and 13 while applying tension to the metal belt 2. Thus, during this rolling, the metal belt 2 is attached to the first rolling row 212 located on the inner peripheral side of the metal belt 2.
Since the first rolling roller 12 has a larger diameter than the second rolling roller 13, the metal in contact with the first rolling roller 12 = 5 - inner circumference of the belt 2 Deformation of the sides is restrained during rolling.

On the other hand, since the second rolling roller 13 has a small diameter, the outer peripheral side of the metal belt 2 is relatively restrained from being deformed during rolling. Therefore, during rolling, the outer circumferential side of the metal belt 2 is expanded more than the inner circumferential side.

As a result, a compressive residual stress is applied to the outer circumferential side and a tensile residual stress is applied to the inner circumferential side), so that the endless metal belt 2 exhibits excellent durability. For example, when power is transmitted through pulleys 1 and 1 as illustrated in FIG. 1, a strong tensile stress acts on the outside of the endless metal belt 2 at the pulley 1. Compressive stress acts on the metal belt 2, but as mentioned above, compressive stress is applied to the outer circumferential side of the metal belt 2, and tensile stress is applied to the inner circumferential side in advance, so it is difficult to avoid severe stress caused by repeated bending stress. Excellent fatigue life can be obtained even under stress conditions.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to generate residual stress that is effective in improving the durability of the endless metal belt, and it is extremely effective in improving the fatigue life of the endless metal belt. It is.

[Brief explanation of drawings]

FIG. 1 is a diagram schematically showing how an endless metal belt is used;
FIG. 2 is a schematic diagram showing an embodiment of the present invention. 2... Endless metal belt, 10.11... Tension roller, 12... First rolling roller, 13... Second rolling roller. Applicant's agent Patent attorney Takehiko Suzue Figure 1

Claims (1)

[Claims] a tension roller that wraps around the endless metal belt and applies tension while running the metal belt; and a first tension roller that contacts the inner peripheral surface of the metal belt and presses the metal belt from the inner peripheral side to the outside. and a first rolling roller provided on the outer peripheral side of the metal belt opposite to the first rolling roller and having a smaller outer diameter than the first rolling roller. An apparatus for manufacturing an endless metal belt, comprising a second rolling roller for rolling the belt.